Wiktionary
hydromagnetic
a. of or pertaining to hydromagnetics
Usage examples of "hydromagnetic".
They had been swimming through a long, tubular chamber filled with stalactites and stalagmites that jutted from above and below and threatened to snag them as they were pulled along by their hydromagnetic drives.
UFOnaut technology has long since abandoned hydromagnetic plasmas, thermonuclear reactions, gigawatt laser jets, or any other concept we know, along with the steam engine and the gas burner, and has probably gone beyond the next three big steps we will make in motive power, too.
I would guess that those forces, reacting through the hydromagnetic fields, broke the material assembly in that part of the Bussard module.